BIOHOME Sintered Glass Filter Media, pH Neutral

The choice of professional hobbyists and breeders. BIOHOME is not a prefilter and does not function as a mechanical filter. It is a biological filter. Always have a good mechanical filter or prefilter before using BIOHOME. BIOHOME functions best in the last stage of the filter process before the water is discharged into the pond. Optimum efficiency is under zero light levels. However BIOHOME does operate in shaded environments. BIOHOME provides the maximum possible surface area and void space for natural removal, using non-toxic, industry grade materials and engineered micro-tunnels within the pellets.